Civic 8 Gen snoring voice

Hi All,
I have a civic 8 gen around 23k done bought brand new and maintained by Honda. I have felt a snoring voice from the engine bay when I switch off the car. The sound keeps coming for a while.
I heard this snoring thing was common in 7th gen. Not sure about the 8th gen.

Note: I feel the voice comes from near the engine block where the generator is placed next to the fuel guage.